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Mohammed MEA, Shati AA, Alfaifi MY, Elbehairi SEI, Alshehri MA, Alhag SK, Suleiman MHA, Ghramh HA, Ibrahim A, Alshehri AM, Al-Mosa AAA, ALaerjani WMA. Acacia honey from different altitudes: total phenols and flavonoids, laser-induced fluorescence (LIF) spectra, and anticancer activity. J Int Med Res 2021; 48:300060520943451. [PMID: 32776800 PMCID: PMC7707861 DOI: 10.1177/0300060520943451] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
Objective To investigate Acacia honey from different altitudes regarding total phenols and flavonoids, laser-induced fluorescence (LIF) spectra and anticancer activity against human cancer cell lines. Methods Anticancer activity was investigated using sulforhodamine B cytotoxicity assays in the following human cancer cell lines: HCT116 (colon); MCF7 (breast), and HepG2 (liver). Total phenols and flavonoids were measured using spectrophotometric methods and LIF was used to differentiate between low and high-altitude honey. Results The LIF spectra differed between low and high-altitude Acacia honey. High altitude Acacia honey was characterized by significantly lower total phenol content (81.47 ± 1.25 mg gallic acid equivalent [GAE]/100 g) and increased total flavonoids (10.63 ± 0.53 mg quercetin equivalent [QE]/100 g) versus low altitude Acacia honey (91.33 ± 0.96 mg GAE/100 g and 8.78 ± 0.23 mg QE/100 g, respectively). Low altitude Acacia honey displayed increased IC50 values against HCT116 and MCF7 cells (264.17 ± 10.5 and 482.65 ± 20.3 µg/ml, respectively) versus high altitude Acacia honey (117.99 ± 12.7 and 189.82 ± 15.8 µg/ml, respectively). Conclusions High altitude Acacia honey had significantly more effective anticancer activity against HCT116 and MCF7 cells compared with low altitude honey.
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Affiliation(s)
- Moammed Elimam Ahamed Mohammed
- Department of Chemistry, Faculty of Science, King Khalid University, Abha, Saudi Arabia.,Unit of Bee Research and Honey Production, Faculty of Science, King Khalid University, Abha, Saudi Arabia
| | - Ali A Shati
- Department of Biology, Faculty of Science, King Khalid University, Abha, Saudi Arabia
| | - Mohammad Y Alfaifi
- Department of Biology, Faculty of Science, King Khalid University, Abha, Saudi Arabia
| | - Serag Eldin I Elbehairi
- Department of Biology, Faculty of Science, King Khalid University, Abha, Saudi Arabia.,Applied Research Sector, Egyptian Organization for Biological Products and Vaccines (VACSERA Holding Company), Agouza, Giza, Egypt
| | - Mohammed Ali Alshehri
- Department of Biology, Faculty of Science, King Khalid University, Abha, Saudi Arabia
| | - Sadeq K Alhag
- Department of Biology, Faculty of Science, King Khalid University, Abha, Saudi Arabia.,Research Centre for Advanced Materials Science (RCAMS), King Khalid University, Abha, Saudi Arabia.,Biology Department, College of Science, Ibb University, Yemen
| | - Mohamed H A Suleiman
- Department of Chemistry, Faculty of Science, King Khalid University, Abha, Saudi Arabia
| | - Hamed A Ghramh
- Unit of Bee Research and Honey Production, Faculty of Science, King Khalid University, Abha, Saudi Arabia.,Department of Biology, Faculty of Science, King Khalid University, Abha, Saudi Arabia.,Research Centre for Advanced Materials Science (RCAMS), King Khalid University, Abha, Saudi Arabia
| | - Akram Ibrahim
- Department of Physics, Faculty of Science, King Khalid University, Abha, Saudi Arabia
| | - Ali M Alshehri
- Department of Physics, Faculty of Science, King Khalid University, Abha, Saudi Arabia
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Janssen NAH, Yang A, Strak M, Steenhof M, Hellack B, Gerlofs-Nijland ME, Kuhlbusch T, Kelly F, Harrison R, Brunekreef B, Hoek G, Cassee F. Oxidative potential of particulate matter collected at sites with different source characteristics. Sci Total Environ 2014; 472:572-81. [PMID: 24317165 DOI: 10.1016/j.scitotenv.2013.11.099] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/06/2013] [Revised: 11/15/2013] [Accepted: 11/19/2013] [Indexed: 04/14/2023]
Abstract
BACKGROUND The oxidative potential (OP) of particulate matter (PM) has been proposed as a more health relevant metric than PM mass. Different assays exist for measuring OP and little is known about how the different assays compare. AIM To assess the OP of PM collected at different site types and to evaluate differences between locations, size fractions and correlation with PM mass and PM composition for different measurement methods for OP. METHODS PM2.5 and PM10 was sampled at 5 sites: an underground station, a farm, 2 traffic sites and an urban background site. Three a-cellular assays; dithiothreitol (OP(DTT)), electron spin resonance (OP(ESR)) and ascorbate depletion (OP(AA)) were used to characterize the OP of PM. RESULTS The highest OP was observed at the underground, where OP of PM10 was 30 (OP(DTT)) to >600 (OP(ESR)) times higher compared to the urban background when expressed as OP/m(3) and 2-40 times when expressed as OP/μg. For the outdoor sites, samples from the farm showed significantly lower OP(ESR) and OP(AA), whereas samples from the continuous traffic site showed the highest OP for all assays. Contrasts in OP between sites were generally larger than for PM mass and were lower for OP(DTT) compared to OP(ESR) and OP(AA). Furthermore, OP(DTT)/μg was significantly higher in PM2.5 compared to PM10, whereas the reverse was the case for OP(ESR). OP(ESR) and OP(AA) were highly correlated with traffic-related PM components (i.e. EC, Fe, Cu, PAHs), whereas OP(DTT) showed the highest correlation with PM mass and OC. CONCLUSIONS Contrasts in OP between sites, differences in size fractions and correlation with PM composition depended on the specific OP assay used, with OP(ESR) and OP(AA) showing the most similar results. This suggests that either OP(ESR) or OP(AA) and OP(DTT) can complement each other in providing information regarding the oxidative properties of PM, which can subsequently be used to study its health effects.
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Affiliation(s)
- Nicole A H Janssen
- Department for Environmental Health, National Institute for Public Health and the Environment (RIVM), P.O. Box, 2720 BA, Bilthoven, The Netherlands.
| | - Aileen Yang
- Department for Environmental Health, National Institute for Public Health and the Environment (RIVM), P.O. Box, 2720 BA, Bilthoven, The Netherlands; Institute for Risk Assessment Sciences, Utrecht University, P.O. Box 80178, 3508 TD Utrecht, The Netherlands.
| | - Maciej Strak
- Department for Environmental Health, National Institute for Public Health and the Environment (RIVM), P.O. Box, 2720 BA, Bilthoven, The Netherlands; Institute for Risk Assessment Sciences, Utrecht University, P.O. Box 80178, 3508 TD Utrecht, The Netherlands.
| | - Maaike Steenhof
- Institute for Risk Assessment Sciences, Utrecht University, P.O. Box 80178, 3508 TD Utrecht, The Netherlands.
| | - Bryan Hellack
- Air Quality & Sustainable Nanotechnology, Institute of Energy and Environmental Technology (IUTA), Bliersheimer Straße 60, 47229 Duisburg, Germany.
| | - Miriam E Gerlofs-Nijland
- Department for Environmental Health, National Institute for Public Health and the Environment (RIVM), P.O. Box, 2720 BA, Bilthoven, The Netherlands.
| | - Thomas Kuhlbusch
- Air Quality & Sustainable Nanotechnology, Institute of Energy and Environmental Technology (IUTA), Bliersheimer Straße 60, 47229 Duisburg, Germany.
| | - Frank Kelly
- MRC-PHE Centre for Environment and Health, School of Biomedical Sciences, King's College London, 150 Stamford Street, London SE1 9NH, United Kingdom.
| | - Roy Harrison
- Division of Environmental Health & Risk Management, School of Geography, Earth & Environmental Sciences, University of Birmingham, Edgbaston, Birmingham B15 2TT, United Kingdom; Department of Environmental Sciences, Center of Excellence in Environmental Studies, King Abdulaziz University, P.O. Box 80216, Jeddah 21589, Saudi Arabia.
| | - Bert Brunekreef
- Institute for Risk Assessment Sciences, Utrecht University, P.O. Box 80178, 3508 TD Utrecht, The Netherlands; Julius Center for Health Sciences and Primary Care, University Medical Center Utrecht, P.O. Box 85500, 3508 GA Utrecht, The Netherlands.
| | - Gerard Hoek
- Institute for Risk Assessment Sciences, Utrecht University, P.O. Box 80178, 3508 TD Utrecht, The Netherlands.
| | - Flemming Cassee
- Department for Environmental Health, National Institute for Public Health and the Environment (RIVM), P.O. Box, 2720 BA, Bilthoven, The Netherlands; Institute for Risk Assessment Sciences, Utrecht University, P.O. Box 80178, 3508 TD Utrecht, The Netherlands.
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Iwasaki T, Terrill J, Shavlakadze T, Grounds MD, Arthur PG. Visualizing and quantifying oxidized protein thiols in tissue sections: a comparison of dystrophic mdx and normal skeletal mouse muscles. Free Radic Biol Med 2013; 65:1408-1416. [PMID: 24095851 DOI: 10.1016/j.freeradbiomed.2013.09.024] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/29/2013] [Revised: 08/09/2013] [Accepted: 09/25/2013] [Indexed: 12/21/2022]
Abstract
Reactive oxygen species (ROS) are not only a cause of oxidative stress in a range of disease conditions but are also important regulators of physiological pathways in vivo. One mechanism whereby ROS can regulate cell function is by modification of proteins through the reversible oxidation of their thiol groups. An experimental challenge has been the relative lack of techniques to probe the biological significance of protein thiol oxidation in complex multicellular tissues and organs. We have developed a sensitive and quantitative fluorescence labeling technique to detect and localize protein thiol oxidation in histological tissue sections. In our technique, reduced and oxidized protein thiols are visualized and quantified on two consecutive tissue sections and the extent of protein thiol oxidation is expressed as a percentage of total protein thiols (reduced plus oxidized). We tested the application of this new technique using muscles of dystrophic (mdx) and wild-type C57Bl/10Scsn (C57) mice. In mdx myofibers, protein thiols were consistently more oxidized (19 ± 3%) compared with healthy myofibers (10 ± 1%) in C57 mice. A striking observation was the localization of intensive protein thiol oxidation (70 ± 9%) within myofibers associated with necrotic damage. Oxidative stress is an area of active investigation in many fields of research, and this technique provides a useful tool for locating and further understanding protein thiol oxidation in normal, damaged, and diseased tissues.
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Affiliation(s)
- Tomohito Iwasaki
- School of Anatomy, Physiology and Human Biology, University of Western Australia, Perth, WA 6009, Australia
| | - Jessica Terrill
- School of Anatomy, Physiology and Human Biology, University of Western Australia, Perth, WA 6009, Australia; School of Chemistry and Biochemistry, University of Western Australia, Perth, WA 6009, Australia
| | - Tea Shavlakadze
- School of Anatomy, Physiology and Human Biology, University of Western Australia, Perth, WA 6009, Australia
| | - Miranda D Grounds
- School of Anatomy, Physiology and Human Biology, University of Western Australia, Perth, WA 6009, Australia
| | - Peter G Arthur
- School of Chemistry and Biochemistry, University of Western Australia, Perth, WA 6009, Australia.
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Prest EI, Hammes F, Kötzsch S, van Loosdrecht MCM, Vrouwenvelder JS. Monitoring microbiological changes in drinking water systems using a fast and reproducible flow cytometric method. Water Res 2013; 47:7131-42. [PMID: 24183559 DOI: 10.1016/j.watres.2013.07.051] [Citation(s) in RCA: 175] [Impact Index Per Article: 15.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2013] [Revised: 07/01/2013] [Accepted: 07/22/2013] [Indexed: 05/25/2023]
Abstract
Flow cytometry (FCM) is a rapid, cultivation-independent tool to assess and evaluate bacteriological quality and biological stability of water. Here we demonstrate that a stringent, reproducible staining protocol combined with fixed FCM operational and gating settings is essential for reliable quantification of bacteria and detection of changes in aquatic bacterial communities. Triplicate measurements of diverse water samples with this protocol typically showed relative standard deviation values and 95% confidence interval values below 2.5% on all the main FCM parameters. We propose a straightforward and instrument-independent method for the characterization of water samples based on the combination of bacterial cell concentration and fluorescence distribution. Analysis of the fluorescence distribution (or so-called fluorescence fingerprint) was accomplished firstly through a direct comparison of the raw FCM data and subsequently simplified by quantifying the percentage of large and brightly fluorescent high nucleic acid (HNA) content bacteria in each sample. Our approach enables fast differentiation of dissimilar bacterial communities (less than 15 min from sampling to final result), and allows accurate detection of even small changes in aquatic environments (detection above 3% change). Demonstrative studies on (a) indigenous bacterial growth in water, (b) contamination of drinking water with wastewater, (c) household drinking water stagnation and (d) mixing of two drinking water types, univocally showed that this FCM approach enables detection and quantification of relevant bacterial water quality changes with high sensitivity. This approach has the potential to be used as a new tool for application in the drinking water field, e.g. for rapid screening of the microbial water quality and stability during water treatment and distribution in networks and premise plumbing.
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Affiliation(s)
- E I Prest
- Department of Biotechnology, Faculty of Applied Sciences, Delft University of Technology, Julianalaan 67, 2628 BC Delft, The Netherlands
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Clavel MA, Messika-Zeitoun D, Pibarot P, Aggarwal SR, Malouf J, Araoz PA, Michelena HI, Cueff C, Larose E, Capoulade R, Vahanian A, Enriquez-Sarano M. The complex nature of discordant severe calcified aortic valve disease grading: new insights from combined Doppler echocardiographic and computed tomographic study. J Am Coll Cardiol 2013; 62:2329-38. [PMID: 24076528 DOI: 10.1016/j.jacc.2013.08.1621] [Citation(s) in RCA: 369] [Impact Index Per Article: 33.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/02/2013] [Revised: 07/17/2013] [Accepted: 08/17/2013] [Indexed: 12/23/2022]
Abstract
OBJECTIVES With concomitant Doppler echocardiography and multidetector computed tomography (MDCT) measuring aortic valve calcification (AVC) load, this study aimed at defining: 1) independent physiologic/structural determinants of aortic valve area (AVA)/mean gradient (MG) relationship; 2) AVC thresholds best associated with severe aortic stenosis (AS); and 3) whether, in AS with discordant MG, severe calcified aortic valve disease is generally detected. BACKGROUND Aortic stenosis with discordant markers of severity, AVA in severe range but low MG, is a conundrum, unresolved by outcome studies. METHODS Patients (n = 646) with normal left ventricular ejection fraction AS underwent Doppler echocardiography and AVC measurement by MDCT. On the basis of AVA-indexed-to-body surface area (AVAi) and MG, patients were categorized as concordant severity grading (CG) with moderate AS (AVAi >0.6 cm²/m², MG <40 mm Hg), severe AS (AVAi ≤0.6 cm²/m², MG ≥ 40 mm Hg), discordant-severity-grading (DG) with low-MG (AVAi ≤0.6 cm(2)/m(2), MG <40 mm Hg), or high-MG (AVAi >0.6 cm(2)/m(2), MG ≥40 mm Hg). RESULTS The MG (discordant in 29%) was strongly determined by AVA and flow but also independently and strongly influenced by AVC-load (p < 0.0001) and systemic arterial compliance (p < 0.0001). The AVC-load (median [interquartile range]) was similar within patients with DG (low-MG: 1,619 [965 to 2,528] arbitrary units [AU]; high-MG: 1,736 [1,209 to 2,894] AU; p = 0.49), higher than CG-moderate-AS (861 [427 to 1,519] AU; p < 0.0001) but lower than CG-severe-AS (2,931 [1,924 to 4,292] AU; p < 0.0001). The AVC-load thresholds separating severe/moderate AS were defined in CG-AS with normal flow (stroke-volume-index >35 ml/m(2)). The AVC-load, absolute or indexed, identified severe AS accurately (area under the curve ≥0.89, sensitivity ≥86%, specificity ≥79%) in men and women. Upon application of these criteria to DG-low MG, at least one-half of the patients were identified as severe calcified aortic valve disease, irrespective of flow. CONCLUSIONS Among patients with AS, MG is often discordant from AVA and is determined by multiple factors, valvular (AVC) and non-valvular (arterial compliance) independently of flow. The AVC-load by MDCT, strongly associated with AS severity, allows diagnosis of severe calcified aortic valve disease. At least one-half of the patients with discordant low gradient present with heavy AVC-load reflective of severe calcified aortic valve disease, emphasizing the clinical yield of AVC quantification by MDCT to diagnose and manage these complex patients.
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Affiliation(s)
| | - David Messika-Zeitoun
- Cardiology Department, AP-HP, Bichat Hospital, Paris, France; INSERM U698 and University Paris 7-Diderot, Paris, France
| | - Philippe Pibarot
- Institut Universitaire de Cardiologie et de Pneumologie de Québec, Université Laval, Quebec City, Québec, Canada
| | | | - Joseph Malouf
- Division of Cardiovascular Diseases, Mayo Clinic, Rochester, Minnesota
| | - Phillip A Araoz
- Division of Cardiovascular Diseases, Mayo Clinic, Rochester, Minnesota
| | | | - Caroline Cueff
- Cardiology Department, AP-HP, Bichat Hospital, Paris, France
| | - Eric Larose
- Institut Universitaire de Cardiologie et de Pneumologie de Québec, Université Laval, Quebec City, Québec, Canada
| | - Romain Capoulade
- Institut Universitaire de Cardiologie et de Pneumologie de Québec, Université Laval, Quebec City, Québec, Canada
| | - Alec Vahanian
- Cardiology Department, AP-HP, Bichat Hospital, Paris, France; INSERM U698 and University Paris 7-Diderot, Paris, France
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Lu JF, Luk F, Gong J, Jaiswal R, Grau GER, Bebawy M. Microparticles mediate MRP1 intercellular transfer and the re-templating of intrinsic resistance pathways. Pharmacol Res 2013; 76:77-83. [PMID: 23917219 DOI: 10.1016/j.phrs.2013.07.009] [Citation(s) in RCA: 66] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/13/2013] [Revised: 07/25/2013] [Accepted: 07/26/2013] [Indexed: 01/16/2023]
Abstract
Multidrug resistance (MDR) is a major impediment to the overall success of chemotherapy in clinical oncology. MDR has been primarily attributed by the ATP-dependent transmembrane proteins, P-glycoprotein (P-gp, ABCB1) and Multidrug Resistance-Associated Protein 1 (MRP1, ABCC1). These proteins maintain sublethal concentrations of intracellular chemotherapeutics by virtue of their drug efflux capacity. In this study, we report the acquisition and dissemination of functional MRP1 via microparticle (MP) mediated intercellular transfer. After we showed the transfer and functionality of P-gp in drug sensitive recipient cells, we report the transfer and time-dependent functionality of MRP1 in drug sensitive leukaemia cells following exposure to MPs shed by MRP1-overexpressing MDR cells. We also demonstrate a remarkable capacity for MPs shed from cells with a P-gp dominant resistance profile to re-template a pre-existing MRP1 dominant profile in recipient cells. These findings have significance in understanding the molecular basis for tumour dominant phenotypes and introduce potential new strategies and targets for the acquisition of MDR and other deleterious traits.
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Affiliation(s)
- Jamie F Lu
- School of Pharmacy, Graduate School of Health, University of Technology, Sydney, NSW 2007, Australia
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Wahlström T, Belikov S, Arsenian Henriksson M. Chromatin dynamics at the hTERT promoter during transcriptional activation and repression by c-Myc and Mnt in Xenopus leavis oocytes. Exp Cell Res 2013; 319:3160-9. [PMID: 23860446 DOI: 10.1016/j.yexcr.2013.07.004] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2013] [Revised: 07/03/2013] [Accepted: 07/05/2013] [Indexed: 12/22/2022]
Abstract
The transcription factors c-Myc and Mnt regulate gene expression through dimerization with Max and binding to E-boxes in target genes. While c-Myc activates gene expression via recruitment of histone modifying complexes, Mnt acts as a transcriptional repressor. Here, we used the Xenopus leavis oocyte system to address the effect of c-Myc and Mnt on transcription and chromatin remodeling over the E-box region in the human telomerase reverse transcriptase (hTERT) promoter. As expected we found elevated and decreased levels of hTERT transcription upon exogenously expressed c-Myc/Max and Mnt/Max, respectively. In addition, we confirmed binding of these heterodimers to both E-boxes already enriched with H3K9ac and H4K16ac. These chromatin marks were further enhanced upon c-Myc/Max binding followed by increased DNA accessibility in the E-box region. In contrast, Mnt/Max inhibited Myc-induced transcription and mediated repression through complete chromatin condensation and deacetylation of H3K9 and H4K16 across the E-box region. Importantly, Mnt was able to counteract c-Myc mediated activation even when expressed at low levels, suggesting Mnt to act as a strong repressor by closing the chromatin structure. Collectively our data demonstrate that the balance between c-Myc and Mnt activity determines the transcriptional outcome of the hTERT promoter by modulation of the chromatin architecture.
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Affiliation(s)
- Therese Wahlström
- Department of Microbiology, Tumor and Cell Biology (MTC), Karolinska Institutet, Box 280, SE-171 77 Stockholm, Sweden
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Dutoit JC, Vanderkerken MA, Verstraete KL. Value of whole body MRI and dynamic contrast enhanced MRI in the diagnosis, follow-up and evaluation of disease activity and extent in multiple myeloma. Eur J Radiol 2013; 82:1444-52. [PMID: 23726124 DOI: 10.1016/j.ejrad.2013.04.012] [Citation(s) in RCA: 60] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2013] [Revised: 04/16/2013] [Accepted: 04/17/2013] [Indexed: 11/25/2022]
Abstract
PURPOSE To evaluate the significance of dynamic contrast enhanced MRI (DCE-MRI) and whole body MRI (WB-MRI) in the diagnosis, prognosis and assessment of therapy for patients with monoclonal gammopathy of undetermined significance (MGUS) and multiple myeloma (MM). MATERIALS AND METHODS The retrospective study includes 219 patients providing 463 WB-MRI and DCE-MRI investigations for the subgroups MGUS (n=70), MM active disease (n=126; this includes 70 patients with new diagnosis of MM, according to the International Staging System (ISS): 41.4% ISS stage I, 20.0% ISS stage II, 7.1% ISS stage III, 31.4% insufficient for staging; and 56 patients with '(re-)active disease': 16.07% relapse, 32.14% progressive disease and 51.79% stable disease) and MM remission (n=23; 60.87% complete remission, 17.39% very good partial remission and 21.74% partial remission). Investigations of patients with hereditary multiple exostoses (n=5), neurofibromatosis (n=7) and healthy persons (n=9) were added as control subjects (n=21). WB-MRI evaluation was done by evaluating thirteen skeletal regions, providing a 'skeletal score'. DCE-MRI images of the spine, were analyzed with regions-of-interest and time-intensity-curves (TIC). RESULTS All TIC parameters can significantly differentiate between the predefined subgroups (p<0.001). One hundred days after autologous stem cell transplantation a 75% decrease of the slope wash-in value (p<0.001) can be seen. A cubic regression trend between 'skeletal score' and slope wash-in (adj.R(2)=0.412) could demonstrate a significant increase bone marrow perfusion if MM affects more than 10 skeletal regions (p<0.001), associated with a poorer prognosis (p<0.001). CONCLUSION DCE-MRI evaluation of the spine is useful for diagnosis of MM, follow-up after stem cell transplantation and evaluation of disease activity. A combined evaluation with WB-MRI and DCE-MRI provides additional micro-vascular information on the morphologic lesions and could help categorize patients with MM in two different groups to offer useful therapeutic and prognostic advise.
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Affiliation(s)
- Julie C Dutoit
- Department of Radiology, MR-1K12, Ghent University, De Pintelaan 185, B-9000 Ghent, Belgium.
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